Serena Williams was out to dinner on Tuesday in San Francisco when a man tried to steal her cell phone He swiped the phone and tried to run off but the tennis player easily caught up with him and got it back Surveillance video from inside and outside the crowded restaurant shows her sprinting out to catch the man Williams appeared to be on a date with her new boyfriend at the time, Reddit found Alexis Ohanion 'Just because you are a lady don't be afraid to step up to any challenge and not be a victim but a hero!' said Williams on Facebook Wednesday She has now been the top-ranked player in the world for 165 consecutive weeks